Top native alders
6 species, native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.
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Grey Alder
Alnus incana
caterpillars
272
hosts
15
food
62
flowers
4
-
Green Alder
Alnus alnobetula
caterpillars
228
hosts
5
food
41
flowers
6
-
Smooth Alder
Alnus serrulata
caterpillars
183
hosts
4
food
29
flowers
8
-
Red Alder
Alnus rubra
caterpillars
179
hosts
7
food
22
flowers
8
-
White Alder
Alnus rhombifolia
caterpillars
124
hosts
7
food
16
flowers
5
shelter
1
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Seaside Alder
Alnus maritima
caterpillars
93
hosts
2
food
11
flowers
3